Year | Value | 2021 | 67.838 | 2020 | 70.042 | 2019 | 70.1 | 2018 | 70.023 | 2017 | 69.793 | 2016 | 69.911 | 2015 | 70.107 | 2014 | 69.862 | 2013 | 69.894 | 2012 | 70.208 | 2011 | 70.261 | 2010 | 69.929 | 2009 | 69.844 | 2008 | 69.849 | 2007 | 69.652 | 2006 | 69.442 | 2005 | 69.204 | 2004 | 68.972 | 2003 | 68.704 | 2002 | 68.541 | 2001 | 68.451 | 2000 | 68.446 | 1999 | 68.748 | 1998 | 69.018 | 1997 | 69.057 | 1996 | 68.752 | 1995 | 68.582 | 1994 | 68.58 | 1993 | 68.588 | 1992 | 68.127 | 1991 | 68.265 | 1990 | 68.095 | 1989 | 67.912 | 1988 | 67.731 | 1987 | 67.523 | 1986 | 67.586 | 1985 | 67.403 | 1984 | 67.923 | 1983 | 67.884 | 1982 | 67.05 | 1981 | 66.385 | 1980 | 65.823 | 1979 | 64.937 | 1978 | 64.85 | 1977 | 63.903 | 1976 | 63.555 | 1975 | 63.451 | 1974 | 63.253 | 1973 | 62.63 | 1972 | 62.461 | 1971 | 62.517 | 1970 | 62.321 | 1969 | 62.167 | 1968 | 61.879 | 1967 | 61.123 | 1966 | 60.217 | 1965 | 59.275 | 1964 | 58.309 | 1963 | 57.233 | 1962 | 56.307 | 1961 | 55.228 | 1960 | 54.172 |
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